Williams Dam Reservoir Report
Nearby: Snyder Dam Schldman Dam
Last Updated: December 12, 2025
Williams Dam, located in Adair, Missouri, serves as a critical structure for grade stabilization along the Little Walnut Creek.
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Summary
Completed in 1998, this private-owned earth dam stands at a height of 25.5 feet, with a hydraulic height of 22 feet and a structural height of 23 feet. With a normal storage capacity of 16 acre-feet and a maximum discharge of 24.5 cubic feet per second, Williams Dam plays a crucial role in managing water resources in the area.
The dam's spillway type is uncontrolled, with a width of 10 feet, and it has a low hazard potential. While the condition assessment is currently not rated, the risk assessment indicates a moderate risk level. Despite not being regulated or inspected by the state, Williams Dam continues to provide essential grade stabilization functions in the region, contributing to water resource management efforts. Water resource and climate enthusiasts can appreciate the engineering and hydrological significance of Williams Dam in maintaining the balance of the ecosystem along the Little Walnut Creek.
Overall, Williams Dam stands as a testament to effective grade stabilization infrastructure, showcasing the importance of private ownership in water resource management. With its strategic location and design, this earth dam serves as a vital component in the local watershed, highlighting the intersection of human-made structures and natural water systems. For those interested in water resource and climate dynamics, Williams Dam offers a fascinating case study in dam engineering and its role in sustaining ecological balance in the Missouri region.
Year Completed |
1998 |
Dam Length |
300 |
Dam Height |
25.5 |
River Or Stream |
LLITTLE WALNUT CREEK |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
22 |
Drainage Area |
774 |
Nid Storage |
22 |
Structural Height |
23 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Williams Dam